Powder formula

Alicia

Okay mamas I need help. When going up on how many ounces you’re giving little one how do you know how many scoop to put for the amounts not on the back. Like I think I want to go up at least an ounce or two from 4oz but it doesn’t have how many scoops to put for odd amounts it’s only got 2 4 and 8 ounces on back of the can. Do I just make 8 ounces and let him drink as much as he wants to see and store the rest?